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Individual
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Individual
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Priority to ES27645ApriorityCriticalpatent/ES27645A1/es
Publication of ES27645A1publicationCriticalpatent/ES27645A1/es
ES27645A1901-04-151901-04-15Un procedimiento de instalación eléctrica de seguridad para impedir los choques y accidentes ferroviarios.
ExpiredES27645A1
(es)
Mejoras en montajes para facilitar la transmisión de señales por los pasajeros en los coches de ferrocarriles, a los conductores o guardas de los trenes.